lesson on food chain and food pyramids

1. Draw the following food chains in your book
1. Caterpillars are eaten by finches which are
eaten by owls. Caterpillars eat oak leaves
2. Grass is eaten by grasshoppers which are
eaten by rats. Hawks eat snakes who eat
rats.
21/03/2017
What do the arrows represent in a
food chain?

2. Owls Hawkes
Finches Snakes
Caterpillar Rats
Oak leaves Grasshopper
Grass
The arrows show how energy is passed through a
series of animals / different trophic levels

3. • By the end of this lesson, you should be able to:
– To identify terms producers and consumers (L3)
– Draw simple food chains from information provided (L5)
– Use food chains to draw food webs (L6)
– Evaluate the impact of a change in population size on
food webs(L6/7)
21/03/2017
Food chains and food webs
Literacy Objective:
Use key terms to interpret feeding
relationships
Skills Objective:
Independent and reflective
learning

4. Human
Cow
Grass
Producer
• Makes food from sun using
photosynthesis
Primary Consumer
• Gains energy by eating
producers.
• Usually herbivores
Secondary Consumer
• Gains energy by eating
primary consumers.
• Usually carnivores but can be
omnivores
https://www.youtube.com/watch?v=qUZkWZ12A8s

5. 14/07/2022
Rather than
drawing a food
chain for each
food an animal
eats, we combine
them to produce a
food web
Lets Check !
Rabbits and wood mouse
both feed on caterpillars.
Caterpillars feeds on
grass. Owl eats wood
mouse and rabbits.

6. • Task 1 - construct three separate food chains.
• Task 2 Then reconstruct these into a food web. Identify
trophic level, prey and predator.
• Task 3 Evaluate the impact of a species loss in one
chain on the whole food web.
• Task 4 Assume than there are 10,000 plants. Estimate
the numbers for each species.
Can you draw a graph to show this? Explain any
differences.
1. Aphids eat plants which are eaten by Ladybird. The ladybird is a prey
of the Blue tits. Owls feed on the Blue tits.
2. Moth Larva feeds on plants which are eaten by spiders. Owls eat
chiffchaff who eat spiders. Spiders are also a prey of the Blue tits.
3.Stoats eats Voles which feeds on the plants. Voles are also a food to
the Owls

8. 14/07/2022

10. Plants
10,000
Aphids
20,000
Ladybirds
10,000
Blue tit
500
Owl
100
In a pyramid of
numbers, the
length of each bar
represents the
number of
organisms at each
level in a
food chain.
As a single tree can support many organisms, this food chain
produces an unbalanced pyramid.

11. Progress Check – answer the following in full
sentences on white boards.
1. What does the arrow in a food chain represent?
Show how energy is transferred between different trophic levels
2. What is always the producer in a food chain?
Green plants
3. Is the primary consumer in a food chain normally a carnivore or
herbivore? Explain why.
A herbivore as it feeds on green plants
4. What will happen to the
population of slugs if the
population of thrushes
decreases
The slugs would increase

12. Year 9 SATS Revision

13. Worksheets to print

14. Human
Cow
Grass
Producer
• Makes food from sun using
photosynthesis
Primary Consumer
• Gains energy by eating
producers.
• Usually herbivores
Secondary Consumer
• Gains energy by eating
primary consumers.
• Usually carnivores but can be
omnivores

15. Keeping Healthy
1. Which organ controls our bodies?
2. What type of material is the heart made out of?
3. What do our lungs do?
4. How does blood travel around our bodies?
5. Why do we need muscles?
6. Give 3 purposes of the skeleton.
7. Which organ cleans the blood and gets rid of waste?
8. What effect would smoking have on our bodies?
9. Name the three different types of teeth.
10. Give two ways to protect your teeth.

16. Eating Healthily
1. What is a balanced diet?
2. Why should we drink lots of water?
3. What effect would lots of fizzy drinks have on our bodies?
4. A) What do carbohydrates provide us with?
B) Which foods contain carbohydrates?
5. Give an example of a food that contains protein.
6. What do fruit and vegetables provide us with?
7. Why do we need to eat some fats?
8. What is fibre and which foods provide us with fibre?
9. Which is healthier - butter or margarine?
10. Which is healthier - brown bread or white bread?

17. Eating Healthily
1. What is a balanced diet?
2. Why should we drink lots of water?
3. What effect would lots of fizzy drinks have on our bodies?
4. A) What do carbohydrates provide us with?
B) Which foods contain carbohydrates?
5. Give an example of a food that contains protein.
6. What do fruit and vegetables provide us with?
7. Why do we need to eat some fats?
8. What is fibre and which foods provide us with fibre?
9. Which is healthier - butter or margarine?
10. Which is healthier - brown bread or white bread?

18. Earth and Space
1. What shape are the Sun, Earth and Moon?
2. A) What does the Earth orbit around?
B) How long does it take?
3. What does the moon orbit around and how long does it take?
4. Put in order of size, smallest to largest the Earth, Sun and Moon.
5. How long does it take for the Earth to rotate once?
6. What causes day and night?
7. Is it night time for Australia and England at the same time?
Why?
8. Does the Sun move around the Earth?

19. Earth and Space
1. What shape are the Sun, Earth and Moon?
2. A) What does the Earth orbit around?
B) How long does it take?
3. What does the moon orbit around and how long does it take?
4. Put in order of size, smallest to largest the Earth, Sun and Moon.
5. How long does it take for the Earth to rotate once?
6. What causes day and night?
7. Is it night time for Australia and England at the same time?
Why?
8. Does the Sun move around the Earth?

20. Forces
1. What is the name of the force that pulls objects down towards
the Earth?
2. What are forces measured in?
3. What will happen in a game of tug of war if both sides apply the
same force?
4. What is friction?
5. Which would provide greater friction - carpet or lino?
6. What does Air Resistance do?
7. How do birds fly is gravity os pulling them to the ground?
8. Which poles on a magnet attract?
9. Which poles on a magnet will repel?
10. Provide an example of a MAGNETIC material.

21. Forces
1. What is the name of the force that pulls objects down towards
the Earth?
2. What are forces measured in?
3. What will happen in a game of tug of war if both sides apply the
same force?
4. What is friction?
5. Which would provide greater friction - carpet or lino?
6. What does Air Resistance do?
7. How do birds fly is gravity os pulling them to the ground?
8. Which poles on a magnet attract?
9. Which poles on a magnet will repel?
10. Provide an example of a MAGNETIC material.

22. Electricity
1. What is the circuit symbol for a bulb?
2. How could you make a bulb in a circuit brighter?
3. What happens if a switch is left open?
4. What could happen is there was too much power in a circuit?
5. What is a conductor?
6. Give an example of a conductive material.
7. What is an insulator?
8. Why is plastic used to cover electrical cables?
9. What could happen if a hair-drier was used in a bathroom?
10. Why should you not fly a kite near electricity pylons?

23. Materials
1. Name the 3 categories of materials
2. Write down two materials which fit into each category.
3. Describe an irreversible change.
4. Give an example of an irreversible change.
5. How would you separate sand, salt and water?
6. How does a tumble drier dry clothes?
7. When cooking, what is the process that happens when water
droplets gather on the window?
8. What happens when sugar is mixed with warm water?
9. What is the mixture called?
10. Is sugar soluable or insoluable?

24. Habitats
1. What is a habitat?
2. Why do birds choose trees for their habitats? 2 reasons
3. Why do frogs live in ponds? Give 2 reasons
4. How are otters adapted for their habitats?
5. How are seals adapted to living in cold conditions?
6. What is a producer?
7. In the food chain,
rose plant green fly blue tit hawk
A) What is the hawk?
B) which are the consumers?
C) Which are the prey?